Piper Mackay / Container freighter travelling through the Panama canal, Panama, November 2008

Matthias Breiter / Western Sandpiper (Calidris mauri) flock flying over mudflats near Tsawwassen with shipping cranes in background, Fraser River, British Columbia, Canada

Terry Whittaker / 2020VISION / Flock of Avocet (Recurvirostra avosetta) in flight with Coryton Oil refinery in background, Site of new DP World London Gateway container port, River Thames, Essex, UK, March 2011

Terry Whittaker / 2020VISION / Avocet (Recurvirostra avosetta) rafting on river at high tide with oil tanker in the background at site of DP World London Gateway container port, Coryton oil refinery, River Thames, Essex, UK, April...

Terry Whittaker / 2020VISION / Flock of Avocet (Recurvirostra avosetta) in flight with Coryton Oil refinery in background, Site of new DP World London Gateway container port, River Thames, Essex, UK, November 2010

Nick Upton / Small container ships coming and going from Hook of Holland harbour. Netherlands, April, 2010.